Soil series finder

Every filter works on the structured fields of the official series description and the Soil Classification database. Filters combine: choosing Mapped in: Iowa and Soil order: Mollisols shows only Mollisols with at least one mapped acre in Iowa. The count in brackets after each option is the number of atlas series with that value before any other filter is applied. The link in your address bar updates as you go, so a search can be bookmarked or shared.

Mapped in uses current SSURGO extent, so it lists every state with at least one acre of the series, not only the states named in the description. Drainage class and depth class are the NRCS classes given in the description; five series have no depth class there and only show up when that filter is left open. Particle-size class and temperature regime are read from the soil family name; sandy Psamments carry no particle-size class in their family name. Parent material is a short label for the material the soil formed in; a series can have more than one.

Mapped is the area of SSURGO map-unit components named for the series. Described depth is how far down the typical pedon was described, which can include rock layers; it is not the same thing as the depth class. The comparison draws each horizon at its recorded depth; a last layer with no recorded bottom is drawn 15 cm deep and faded.

This is a reference tool. It reports what the descriptions and soil survey say about typical soils; it does not describe any particular field. The guides explain drainage classes, depth classes and described depth and five worked searches.

Sources: USDA–NRCS Official Series Descriptions, Soil Classification database and SSURGO (Soil Data Access), Official Series Descriptions and Soil Classification database snapshot 2026-10-26; SSURGO tabular data as served by Soil Data Access on 2026-10-27 (survey area save dates 8/23/2026 7:48:35 PM to 10/26/2026 10:17:40 PM). Filtering, counts and comparisons computed by Soil Series Atlas. Data & method